Plant: Plant low, glabrous, perennial; stem creeping, ribbed, hollow Leaves: simple; petiole 0.5-25 cm, slender; blade 1-4 cm wide, round-peltate, crenate or very shallowly, crenately, subequally 8-13-lobed INFLORESCENCE: umbels small, many, 1-15-flowered, in a simple or forked spike; peduncles 1.5-20 cm; pedicels 0 or short Flowers: many, small; calyx lobes 0 or minute; petals obtuse or acute, greenish or yellowish white to purplish, tip not incurved; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a ± conic, persistent projection or platform on top subtending 2 free styles Fruit: 2 dry, 1-seeded halves that separate from each other but generally remain attached for some time to a central axis, 1-3 mm,, elliptic to round, very compressed side-to-side; ribs acute, evident; oil tubes 0 (but individual oil cells in fruit wall); fruit central axis not an obvious structure; Seed: face flat to convex Misc: Swampy ground, lake margins; < 100 m.; Apr-Sep Notes: found in wet habitat References: McDougall; Seed plants of N. AZ, Kearney and Peebles; AZ Flora, ASU Specimens